How to order Hose Fitting
Note:1.For use with braided hoses.2.If use with spiral hoses,the fifth number of hose fitting series change from "1" to "2",for example: from P26711-**-** to P26712-**-**
MATERIAL | CARBON STEEL | COPPER | STAINLESS STEEL |
SIGN | - | BR | SS |
HOSE DN | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 | 20 | 22 | 25 | 32 | 40 | 45 | 50 | 64 |
HOSE DASH | -01 | -02 | -03 | -04 | -05 | -06 | -08 | -10 | -12 | -14 | -16 | -20 | -24 | -28 | -32 | -40 |
BSP THREAD | G1/8"28 | G1/4"×19 | G3/8"×19 | G1/2"×14 | G5/8"×14 | G3/4"×14 | G1"×11 | G1.1/4"×11 | G1.1/2"×11 | G2"×11 | |
BSPT THREAD | R1/8"28 | R1/4"×19 | R3/8"×19 | R1/2"×14 | R3/4"×14 | R1"×11 | R1.1/4"×11 | R1.1/2"×11 | R2"×11 | ||
NPT THREAD | RZ/8"27 | Z1/4"×18 | Z3/8"×18 | Z1/2"×14 | Z3/4"×14 | Z1"×11.5 | Z1.1/4"×11.5 | Z1.1/2"×11.5 | Z2"×11.5 | ||
JIC THREAD | 7/16"×20 | 1/2"×20 | 9/16"×18 | 3/4"×16 | 7/8"×14 | 1.1/16"×12 | 1.5/15"×12 | 1.5/8"×12 | 1.7/8"×12 | 2.1/2"×12 | |
FLANGE SIZE | 1/2" | 3/4" | 1" | 1.1/4" | 1.1/2" | 2" | |||||
DASH | -02 | -04 | -05 | -06 | -08 | -10 | -12 | -16 | -20 | -24 | -32 |
Note:The dash of metric thread accords with the O.D of thread. |
Hydraulic hose fittings are necessary when connect various conductors such as tubes, pipes, and hydraulic hoses in the hydraulic system. Most connections have an external thread and an internal thread part to fit the connection and help control and direct the flow of fluid.Also it can prevent any leakages and maintain pressure in the hydraulic system. Consequently, hydraulic fittings need to be strong, versatile, and reliable to operate safely and effectively in their respective applications. These fittings typically adhere to strict standards which dictate fitting construction, dimensions, and pressure ratings.
1. Connection Type Hydraulic Fittings
Hydraulic hose fittings are attached via a number of different connection methods, each with its own conveniences and advantages.
2. Compression Hydraulic Fittings
Hydraulic compression fittings include all types of fittings which use compressive force to connect the vessel to the fitting.
1)Standard compression fittings use metal gaskets, rings, or hoops that compress to form a seal on the container. The compression is typically made by tightening a nut onto the fitting over the piping and ferrule, compressing, and securing the vessel inside. Standard compression fittings do not require tools to assemble, making them easy to install quickly in the field.
2)Bite-type fittings are compressive fittings with a sharpened ferrule that "bites" the vessel when compressed and provides the seal. Bite joints, like standard compression joints, do not require special tools to assemble, but provide a stronger, higher pressure connection.
3)Flare fittings consist of a body with a flared or coned end. Special flaring tools are used to install the vessel inside the flared end, providing a deep seal. Flare fittings can handle higher pressures and a wider range of operating parameters than standard compression fittings.
3.Crimp Hydraulic Fittings
Crimp fittings involve placing hose over a tubular end and crimping against it with a sleeve, ring, or crimp socket. These fittings usually require crimping tools or machines to connect.
4.End Hydraulic Fittings
End fittings provide specific surfaces for connecting vessels in hydraulic systems. A flat end is a pipe fitting whose surface allows the pipe to be joined by bonding, welding, welding or other permanent means.Welding, when done properly on compatible materials, provides a strong and reliable connection.
5.Flange Hydraulic Fittings
Flange fittings are rims, edges, ribs, or collars with flush surfaces perpendicular to the attached pipe or tube. These surfaces are joined and sealed via clamps, bolts, welding, brazing, and/or threading.
6.Push-to-Connect
Push-to-connect fittings have ends that are designed to accept tubing by pushing it into the end. These fittings typically disconnect via some type of collar retraction. These connections are handy for parts of the system that need to be disconnected and reconnected frequently.
7.Threaded Hydraulic Fittings
Threaded fittings have screw threads (built-in grooves) on their inner (female) or outer (male) surfaces designed to accept connections with matching threads. Threads which provide a simple connection but no seal are called straight threads. Tapered threads are designed to provide a tight seal against gas or fluid under pressure. Sealing reliability can be improved by adding coating or sealing tape (teflon).Especially precise threads are called "dry fit", meaning they seal without the need for an additional sealant, which is important in applications where sealant addition could cause contamination or corrosion. The thread size is measured and based on the inside of the vessel. Thread size standards include NPT (National Pipe Thread) and BSP (British Standard Pipe), though other standards exist and usage often varies by country and industry. Each standard corresponds to a particular number of threads per inch (TPI).